#include "iostream"
typedef int BTDataType;
using namespace std;

typedef struct BinaryTreeNode
{
	BTDataType _data;
	struct BT* _left;
	struct BT* _right;
}BT,BTNode;
BTNode* BinaryTreeFind(BTNode* root, BTDataType x)
{
	BTNode* cur;
	cur = root;
	if (root == NULL)
		return NULL;
	if (root->_data == x)
		return root;
	BTNode*
	return cur;
}